Valve



0t 10 1933 H. w. LANDENBERGER ET AL 1,929,643

VALVE Filed April 22. 1930 VPatented oci. 1o, 1933 Henry W. ,Landenbergen and i. Harry Philadelphia, Pa., assignors to American y Motors Company, Philadelphia, Pa., a corporation of Pennsylvania Application April 22, 1930. Serial No. 446,365

1 claim. i (ol. la7- 139)Y This .invention relates to improvements in Valves, and one ofthe objects of the invention is toprovide a pressure-actuated check valVe having improved structural and operating characteristics, as hereinafter set forth.

A more specic object of the invention is toA provide a valve of the stated type in which the said valve actuating means shall be contained entirely within the valve casing, thereby avoidingr a necessity for stuffing Yboxes and packing with their attendant disadvantages.

Another object of' thefinvention is to provide means Vfor rendering the valve actuating means eective to unseat the valve element with 'a min- Vimum of delay or lag.

The invention further resides in novel and improving structural features and details hereinafter set forth and illustrated in the attached' drawing, in which: y

Figure 1 is an elevational View of a valve made in accordance with our invention;

Fig. 2 is a section on the line 2--2, Fig. 1, an

l Fig. 3 is a View in' perspective of one of the elements ofthe valve.

H255 With reference to the drawing, the valve in one Y'embodiment comprises a casing 1 having a removable top closure member 2 and ports 3, 4, 5 and 6, the functions of which Will be hereinafter Vset forth. Within the casing lis a seat 7 fora main valve element 8, which element as shown in Fig. 2 controls the connection between the ports 4 and 5. A spring 9 confined between the closure member Zand the valve 8 tends to retainl the latter on its seat.

In the interior of the casing 1 below the valve 8 is a chamber 10, the open upper end of which provides a cylinder in whichY operates a plunger 11.' Preferably the walls of the chamber 10 are integral with the casing 1 as shown. As illustrated in Fig. 1, the port 6 extends into'the chamber 10 and affords means for admitting to that chamber fluid pressure for forcing the plunger 11 upwardly against the valve 8 to unseat the latter. Carried by the Valve 8 is an auxiliary pressure 45 relief valve 12, the upper end of which is guided` in a cylindrical recess 13 in the cover member 2, while the lower extension, when the valve is seated as shown inr Fig; 2 projects below the bottom of the valve 8 and inthe path of the plunger 11 whereby the latter when actuated by pressure admitted through the port 6 first engages and unseats the auxiliary valve 12 before Abecoming effective to unseat the mainvalve 8.

One application of a valve of this character is shown in'our copending application SrN. 367,001,

' boxes of the usual type.

led May 29, 1929, of which the present appli- 352 cation is a continuation in part. In thatinstance fluid pressure is applied from a suitable source to a-pressure actuated platen press through the said valve, the port 3 being connected to the 60 said source and the vportl to the press.l During operation of the press, the valves 8 and, 12 are held to their seats by the fluid pressure inthe upper end of the valve chamber, the spring 9 functioning primarily to prevent hanging-up of the valve and insuring return thereof to its seat t; after being elevated and released asv hereinafter set forth. l g

, When it is-desired to release .the fluid pressure from the ramcylinder of thepress, the pressurexV in the pressureareas of theplunger ligand the valve 12 being in favor of the plunger, the auxilim' iary valveis readily forced from its seat, thereby i equalizing, the pressures at opposite sides of the f main valve 8` and permitting the plunger 11 to become immediately effective to elevate the main valve in spite of the unfavorable kdifferential in 2,1 the pressure areas of the plunger 11 andmain valve 8. Elevation ofthe valve 8 affords a rapid discharge of pressure from the press ram cylinder through the port 4 and the exhaust 5. By re- 85 versing the fluid pressure from the port 6to the@` port 3 the valve elements are again returned to their seats and pressure again appliedv to the ram cylinder. Y v

It will `be noted that the valve is characterized by a complete absence of packings or stuffingl This is accomplished by establishing the valve actuating means 10-11 entirely Vwithin the valve casing. Any leakage past the plunger 11 passes immediately to the 95 'l discharge port 6, and since the actuating means-'zzy lies within the casing there is no requirement forV 1 Ya stuffing box in the casing itself as would be necessary for passage through the vcasing ofv an operating rod from an external actuator. l00

' The arrangement affords a desirable simplicity ff and oompactness in the valve structure and avoids the disadvantagesin operation andvmain- VVtenanc'e resulting from the `use of the stuffing l to stem in the casing, a spring seated against the main Valve and casing in said upper chamber and tending to retain the main valve on its seat, a cylinder located in the lower chamber, a plunger in said cylinder, and a port extending from said cylinder to the exterior of said casing, said piston being so constructed and arranged that Vwhen actuated.A by uid pressure inthe cylinder it successively engages and unseats the supplemental and main valves.

VHENRY W. LANDEN'BERGER.

HARRY W. LINK. 

